Question

我需要在根目录中创建 CAT_IMG 文件夹，并在列表视图中检索它。但是CAT_IMG文件夹没有在根目录中创建。我在清单文件中添加了权限。请帮我在根目录下创建一个文件夹。

   private void createDirectoryAndSaveFile(Bitmap imageToSave) {

        File direct = new File(getApplicationContext().getFilesDir() + "/CAT_IMG");
        String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date());
        String fileName = "fav" + timeStamp + ".JPG";
        if (!direct.exists()) {
            File wallpaperDirectory = new File("/CAT_IMG");
            wallpaperDirectory.mkdir();
        }

        File file = new File(new File("/CAT_IMG"), fileName);
        if (file.exists()) {
            file.delete();
        }
        try {
            FileOutputStream out = new FileOutputStream(file);
            imageToSave.compress(Bitmap.CompressFormat.JPEG, 100, out);
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == 1 && resultCode == Activity.RESULT_OK) {
            Bitmap photo = (Bitmap) data.getExtras().get("data");
            createDirectoryAndSaveFile(photo);
            Log.e("URI", data.getExtras().get("data") + "");

        }
    }

在列表视图中检索它的代码：

private void getImages() {
    String[] filenames = new String[0];
    File path = new File(getApplicationContext().getFilesDir() + "/CAT_IMG");// add here your folder name
    if (path.exists()) {
        filenames = path.list();
    }
    for (int i = 0; i < filenames.length; i++) {
        photos.add(path.getPath() + "/" + filenames[i]);
        Log.e("FAV_Images", photos.get(i));
        Name.add(filenames[i]);
        //Sno.add(i);        }
    }

}

Answer 1

我在根目录中创建了一个文件夹，在上面的代码中做了很小的改动 `

private void createDirectoryAndSaveFile(Bitmap imageToSave) {

        File direct = new File(getFilesDir() + "/CAT_IMG/");
        String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date());
        String fileName = "fav" + timeStamp + ".JPG";
        if (!direct.exists()) {
           // File wallpaperDirectory = new File("/CAT_IMG");
            direct.mkdir();
        }

        File file = new File(direct, fileName);
        if (file.exists()) {
            file.delete();
        }
        try {
            FileOutputStream out = new FileOutputStream(file);
            imageToSave.compress(Bitmap.CompressFormat.JPEG, 100, out);
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == 1 && resultCode == Activity.RESULT_OK) {
            Bitmap photo = (Bitmap) data.getExtras().get("data");
            createDirectoryAndSaveFile(photo);
            Log.e("URI", data.getExtras().get("data") + "");

        }
    }`

如何在根目录Android中创建文件夹

1 个答案: